most derived class

基本解释

When overridden in a derived class, gets the current item as a boxed object of the most appropriate .
当在派生类中重写时，根据当前项的架构类型以最合适的。
Most of the conclusions derived from analysis can be stated in impersonal terms, as applicable to investors or speculators as a class.
从分析中所获得的大多数结论都可以建立在客观条件之上，从而既能用于投资者也能用于投机者。
blog.sina.com.cn
Although sometimes you may want an event that can only be raised by the base class, most of the time, you should enable the derived class to invoke base class events.
虽然有时您可能会想要使用只能由基底类别所引发的事件，但是在多数情形下，您应该启用衍生类别来叫用基底类别事件。